<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>基本用法</title>
<link href="css/bootstrap.min.css" rel="stylesheet" type="text/css">
<link rel="stylesheet" href="style.css">
</head>

<body>
<div class="container">
  <div class="row">
    <div class="col-sm-4">.col-md-4</div>
    <div class="col-sm-8">.col-md-8</div>
  </div>
  <div class="row">
    <div class="col-sm-4">.col-md-4</div>
    <div class="col-sm-4">.col-md-4</div>
    <div class="col-sm-4">.col-md-4</div>
  </div>
  <div class="row">
    <div class="col-sm-3">.col-md-3</div>
    <div class="col-sm-6 col-sm-offset-3">.col-md-6</div>
  </div>
</div>
</body>
</html>